So the servant placed his hand under the thigh of his master Abraham and gave his solemn promise he would carry out his wishes. ¹ 

When the man ¹  saw that he could not defeat Jacob, ²  he struck ³  the socket of his hip so the socket of Jacob’s hip was dislocated while he wrestled with him.

That is why to this day ¹  the Israelites do not eat the sinew which is attached to the socket of the hip, because he struck ²  the socket of Jacob’s hip near the attached sinew.